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Finding the Fourth Proportional to 427.27, 640.39 and 166.96

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Solution

The fourth proportional to 427.27, 640.39 and 166.96 is: 250.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    427.27 : 640.39 = 166.96 : x
  2. Step 2: Convert to fraction form
    427.27/640.39 = 166.96/x
  3. Step 3: Cross multiply
    427.27x = 640.39 × 166.96
  4. Step 4: Simplify right side
    427.27x = 106,915.48
  5. Step 5: Solve for x
    x = 106,915.48/427.27
  6. Step 6: Final answer
    x = 250.23

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.